摘要
针对丁酮肟盐酸盐(MEKOH)的热危险性问题,在纯MEKOH热分解的基础上,选择水和丁酮肟(MEKO)作为杂质添加剂,采用差示扫描量热法(Differential Scanning Calorimetry,DSC)进行基础量热试验,探究杂质对其热危险性的影响。DSC测试结果显示:水分的存在让MEKOH的初始分解温度降低,放热量大大减小,危险等级降为1级,表明适度湿度环境有助于提升MEKOH储运安全性;MEKO的引入则导致热稳定性急剧下降,使得MEKOH的初始分解温度区间变为50.5~81.2℃,且诱发多个连续放热峰,不同含量MEKO诱发最大峰的放热量为425.6~553.2 kJ/kg,危险等级转为2级,表明在生产过程中要严格控制MEKO的残留量,并采取相应安全措施,避免多阶段放热反应的链式触发。
To evaluate the thermal hazard of methyl ethyl ketoxime hydrochloride(MEKOH)through differential scanning calorimetry(DSC)to quantify impurity effects on decomposition characteristics,based on the thermal analysis of pure MEKOH decomposition,water and methyl ethyl ketoxime(MEKO)are selected as impurity additives for fundamental calorimetric tests.The DSC testing results demonstrate two distinct decomposition regimes:The presence of water reduces the initial decomposition temperature of MEKOH,significantly decreases the heat release,downgrading its hazard level to Class 1,which indicates that moderate humidity enhances the storage and transportation safety of MEKOH.The introduction of MEKO drastically compromises thermal stability,shifting MEKOH’s initial decomposition temperature range to 50.5~81.2°C,and inducing multiple consecutive exothermic peaks with the maximum peak heat release of 425.6~553.2 kJ/kg,which elevates the hazard level to Class 2.These findings mandate strict control to MEKO residues in the production,and recommend safety measures to prevent the chain triggering of multi-stage exothermic reactions during the industrial handling.
作者
张玉雯
杨林娟
ZHANG Yu-wen;YANG Lin-juan(School of Safety Engineering and Emergency Management,Nantong Institute of Technology,Nantong 226601,China;School of Mechanical Engineering,Nantong Vocational University,Nantong 226007,China)
出处
《南通职业大学学报》
2025年第1期89-93,共5页
Journal of Nantong Vocational University
关键词
丁酮肟盐酸盐
热危险性
差示扫描量热法
危险等级
methyl ethyl ketoxime hydrochloride(MEKOH)
thermal hazard
Differential Scanning Calorimetry
hazard level
